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Rob Jasper wrote:

In the 'derived' view in the second tab (example 2) the empty fields under heading Nr do contain a 
formula to display the number only if something is specified in the 'map' column in the main list 
(example 1).
COUNTA also counts cells when they only contain a formula that returns an empty string. So, the 
effect is that it will count all cells.
COUNT only counts cells containing numeric values
I couldn't find how to use COUNTIF to do what I want. I always seem to have troibles with the 
I tried:
COUNTIF(D$4:D4,"<> ")
COUNTIF(D$4:D4,'<>" "')    ##   
COUNTIF)D$4:D4,"<>''")     ## string delimited with single quotes, inside total condition withing 
double quotes

I just found 2 formats that seem to work:

and also
No clue why this works, but it does...

You can use expressions like COUNTIF(D$4:D4,">2") to count cells with a value greater than 2.

There are two main conventions I've come across in programming languages for "not equals" - "<>" or "!=". COUNTIF seems to use "<>" - you can use an expression like COUNTIF(D$4:D4,"<>2") to count cells with a value not equal to 2, or COUNTIF(D$4:D4,"<>Hello") to count cells with a value not equal to "Hello".

I guess COUNTIF(D$4:D4,"<>") counts all cells not equal to blank.

I'd never thought of that. In the past, I've used COUNTIF(D$4:D4,".+"), which requires Tools > Options > Calc > Calculate > "Enable regular expressions in formulae" to be enabled. ".+" is a regular expression matching cells which contain one or more characters. It looks like I've been overlooking an easier (and probably efficient) solution, so thanks for mentioning that.


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